Val I appreciate this! We were posting at the same time so I am coming back to address.
I understand where you are coming from, and for now I have agreed to this Saturday night. If there is a concern after a time or two we will re-evaluate. I am hoping he will find a place to live by then and it will be a non issue.
There is a serious concern for safety as he has used in the home, and may again if I am not here to stop it. He brings his party buddies here and the kids literally make fun of them, it is sad honestly.
I am hoping that I can enforce that boundary and if he wants to see that buddy he has all of the time in the world to do it when he is not with the kids.
So for now he will be here this weekend and I will go, and after talking to my L I will have a clearer handle on it.